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A013135
arcsin(tanh(x)+tan(x))=2*x+8/3!*x^3+320/5!*x^5+31488/7!*x^7...
0
2, 8, 320, 31488, 6241280, 2048135168, 1005768458240, 690254567374848, 630909848433459200, 740848367450511638528, 1086821026187766828892160, 1947858113799053357202014208, 4187952101776996175279418245120
OFFSET
0,1
CROSSREFS
Sequence in context: A012536 A012541 A054943 * A012999 A013003 A009707
KEYWORD
nonn
AUTHOR
Patrick Demichel (patrick.demichel(AT)hp.com)
STATUS
approved